/*
 * JBoss, Home of Professional Open Source
 * Copyright 2005, JBoss Inc., and individual contributors as indicated
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
package org.jbpm.pvm.internal.wire.descriptor;

/** helper for converting boolean values into the appropriate descriptor.
 * 
 * @author Tom Baeyens
 */
public abstract class BooleanHelper {
  
  /** translates a tristate (true, false, null) Boolean value into 
   * the appropriate descriptor ({@link TrueDescriptor}, {@link FalseDescriptor} 
   * or {@link NullDescriptor}). */ 
  public static AbstractDescriptor createDescriptor(Boolean tristate) {
    if (tristate==null) {
      return new NullDescriptor();
    } else if (Boolean.TRUE.equals(tristate)) {
      return new TrueDescriptor();
    }
    return new FalseDescriptor();
  }

}
